Wow, Just got back from a trip to the Mountains in Western NC and my Model S 90D was a blast to drive! All Wheel Drive Air Suspension Regen Energy Huge Sunroof Whisper quiet All Wheel Drive: I think this goes without saying that traction is needed when you are in the mountains. Tesla's AWD system is one of the best in the world (if not THE best) and there wasn't a single time that I felt the car losing grip. I really felt unstoppable going up a VERY steep gravel road. Air Suspension: Raise it up to max height for dirt/gravel roads, drop it down to low for those windy twisty paved roads. It's almost like 2 vehicles in 1. It was extremely versatile to have different options for different terrain. Regenerative Energy: I almost felt a little bit seeing all the other vehicles going down the hill and their brake lights on knowing that they were using their brakes when I was getting more energy into my battery. I used A Better Routeplanner to check my trip and it said I would only use 1% of my battery to get from point A to B and i thought it has to be a mistake but it was right and at 1 point i gained 3% of my battery back just going down hill and was averaging -220 kWh/mi over 5 miles! Yes, it was painful to see 750+ kWh/mi going up the mountain but going down and not touching the brakes felt really good! Huge Sunroof: Sorry for all the Facelift cars that cant enjoy it but it was really nice having the sun shining down and a panoramic view out the roof of the car. Windows down, sunroof open and cruising around enjoying the cool mountain air and sounds Whisper Quiet: Pull over to the overlook on the Blue Ridge Parkway and all you hear is the gravel crunching under the tires or slowing down on a back road to see some deer munching on the grass and you just feel so natural. Zero emissions, no smell, no idle just you, your Tesla and nature Of course there are all the other things that Tesla's bring like Tesla Supercharging network, Autopilot, self parking when you go into town, the huge center screen to see Satellite images around you, Single gear drivetrain for those 'Austin Powers' 30 point turn arounds, and the underlying safety of the structure of the car. Unfortunately no one else had the same pleasure as I did because I never saw another Model S on the road.